Locking latch



Sept. 30,` 1930. v A. alRnsAL-.L

LOCKING I .ATCH

Filed June 2,5, 1928 A TTORNE Y S PatentedV Sept. 30,v 19,30V

UNITED y STATES ALBERT L. BInDsALL,

iinnmin `iannss Looxmennfron Y:

l Application led .Tune 25,

the same time is comparatively strong and durable. v

Objects pertaining to details and economies Vof my invention will definitely'appear from the detailed descriptionto follow.V The invention is defined in the claims.

Y vided with a finishing housing A structure embodying the features of my invention is clearly illustrated in the accompanying drawing, in which: v

Fig. l is a side view partially in longitudinal section on line 1-1 of Fig. 2.

Fig. 2 is a rontview.

Fig. 3 is a detail view mainly in section on line 3-3 of Figs. 1 and 2.

Fig. 4 is a detail section corresponding to that of Fig. 3 with the'bolt in locking position( Y v Fig. 5 is a perspective view of the sleeve and a portion of the handle.

Fig. 6 is a perspective view of the locking cylinder or locking unit.

The structure illustrated lin thefaccompanying drawing comprises an elongate handpiece 1 provided with a barrel or sleeve 2. A finishing housing 3 sleeve. The escutcheon plate 4 is also pro- The sleeve is rotatably associated with the escutcheon plate and also with a yspindle 6 which is provided with a head 7 disposed within the sleeve and transversely slotted at 8 to receive the bolt 9.V The bolt 9 is pro- Y vided. with lugs 1() andv 11V which project through longitudinal slots 12 in the sleeve so that the bolt is secured to the vsleeve Ato rotate therewith but longitudinal movement is permitted.

,- out-.turned flange 13'having .a slot or notch 14 therein with which the lug 11 engages when Vthe bolt is shown in Fig. 4. When in this locking position shownin Fig. 4 the sleeve is locked against rotative movement by with the escutoheon plate.l

of this invention is to thereof i is provided for this' an escutcheon plate 1 Y whereby it may The escutcheon plate is provided with an Y in locking position or disengaged from the spindle as this` engagement of the Ybolt Y nies. seriainpzaoim he locking cylinderworwlocling unit l5 is 'provided 'with a' cam member Y16 disposed within the cup-like' recess"` 17 on the bolt to be engagedby the lug 181 on-th'e bolt, rs'o that as the locking: member fis "actuatedto locking .positionxfthe cam is rotated, thereby retracting "the bolt .from v engagement kwith theV spindle and bringing itinto engagement with the escutcheonr plate.V 1 :In E" theV embodiment illustrated ithefcup jportionoi` thebolt is formed` as afsep ar ate stamping?` butj isv tixedly secured thereto :and becomes an integral part A coileds-pring 19A is arranged between the end `of the lockingunit andthe `boltrso thatit actsto urge the bolt to. spindlejengagingposition. H P 1 .o :1

.- `My. improvedlock is very simplej-in its parts .and the parts` may. be readily .assem* bled. Should an attempt Y the Edoor."by'ftorfcibly"turning the handle when inlocked position, this movement is not imparted to the spindle and, therefore, the'v latch is not affected.

' VHaving thus described my inventionwhat d Patent is 1. The combination of aV handpiece providedwith a sleeve having longitudinal slots adjacent its inner end, a spindle provided with a transversely slotted head, Vrotatable within the inner end of'said sleeve and provided with a transverse bolt receiving groove,

having an opening to receive said sleeve, said opening being provided with an outwardly projecting flange having a notch ,therein,.a bolt within said sleeve priovided with lugs engaging said longitudinal slots therein wherebythebolt is supported for longitudinal movement within said sleeve be engaged or disengaged Jrrom said spindle,jon'e of said lugs oeing adapted to engage said notch in said escutch-l Veon plate Vwhen the bolt is retracted, a locking unit mounted within said sleeve and provided with a cam coacting with saidbolt, and a spring acting to urge saidbolt to spindle engaging'position. Y

2.' The combination of a handpiece probe made tosopen r vided with a sleeve having longitudinal slots adjacent its inner end, a spindle provided with a transversely slotted head rotatable within the inner end of said sleeve and provided with a transverse bolt receiving groove, an escutcheon plate having an opening to receive said sleeve, said opening being provided with an outwardly projecting flange having a notch therein, a bolt within said sleeve provided with lugs engaging said longitudinal slots therein whereby the bolt is supported l for longitudinal movement within said'sleeve A whereby it may be engaged or disengaged from said spindle, one of said lugs being adapted to engage said notch in s aid escutcheon plate when the bolt is retracted, and a locking unit mounted within said sleeve and operatively associated with said bolt whereby it may be moved from spindle to escutcheon engagingposition.

3. The combination of a handpiece provided with a sleeve, a spindle rotatable within the inner end of said sleeve and provided with a transverse bolt receiving groove, an escutcheon plate through which said sleeve is disposed, a boltmounted for longitudinal movement within said sleeve and adapted when in one position to engage said spindle and when in another position to release said spindle and engage said escutcheon plate, a locking unit mounted within said sleeve and provided with a cam acting to' disengage the bolt from said spindle, and a spring acting to urge said bolt to spindle engaging position.

In witness whereof I have hereunto set my hand.

ALBERT L. BIRDSALL.

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